From ceb8404667069bb2cb106395da513cd7b05db643 Mon Sep 17 00:00:00 2001
From: "Joshua C. Colp" <jcolp@sangoma.com>
Date: Tue, 9 Mar 2021 20:35:08 -0400
Subject: [PATCH] channel: Fix crash in suppress API.

There exists an inconsistency with framehook usage
such that it is only on reads that the frame should
be freed, not on writes as well.

ASTERISK-29071

Change-Id: I5ef918ebe4debac8a469e8d43bf9d6b673e8e472
---
 main/channel.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/main/channel.c b/main/channel.c
index 64d93c4fe7..9154a2c41f 100644
--- a/main/channel.c
+++ b/main/channel.c
@@ -10845,7 +10845,9 @@ static struct ast_frame *suppress_framehook_event_cb(struct ast_channel *chan, s
 	if (suppress_frame) {
 		switch (frame->frametype) {
 		case AST_FRAME_VOICE:
-			ast_frfree(frame);
+			if (event == AST_FRAMEHOOK_EVENT_READ) {
+				ast_frfree(frame);
+			}
 			frame = &ast_null_frame;
 			break;
 		default: